Top 5 Choices

Magnesium, Ranked by Purity

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You might be paying for filler, not magnesium. We lab-tested the top 5 magnesium supplements for heavy metals and hidden fillers. The results weren't close. Some bulk up their dose with magnesium oxide, a cheap filler form. Heavy metal levels swung wildly from brand to brand. One stood apart, with up to 46x less than the rest. Every bottle says "pure." Only one earned the top spot. See 2026's Top 5 magnesiums, ranked by what's actually inside.